[fish] Remove unused functions

fish/.config/fish/functions/dj.fish

@@ -1,3 +0,0 @@
-function dj
-	python manage.py $argv
-end

fish/.config/fish/functions/djrun.fish

@@ -1,4 +0,0 @@
-#!/usr/bin/env fish
-function djrun
-	django-admin runserver 0.0.0.0:8000
-end

fish/.config/fish/functions/djsh.fish

@@ -1,4 +0,0 @@
-#!/usr/bin/env fish
-function djsh
-	python manage.py shell_plus
-end

fish/.config/fish/functions/djtest.fish

@@ -1,3 +0,0 @@
-function djtest
-	DJANGO_SETTINGS_MODULE=ff.settings.ci python manage.py test $argv
-end